libgo/go/syscall/route_darwin.go

   1 // Copyright 2011 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package syscall
   6
   7 import "unsafe"
   8
   9 func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
  10         switch any.Type {
  11         case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
  12                 p := (*RouteMessage)(unsafe.Pointer(any))
  13                 return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
  14         case RTM_IFINFO:
  15                 p := (*InterfaceMessage)(unsafe.Pointer(any))
  16                 return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
  17         case RTM_NEWADDR, RTM_DELADDR:
  18                 p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
  19                 return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
  20         case RTM_NEWMADDR2, RTM_DELMADDR:
  21                 p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
  22                 return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr2:any.Msglen]}
  23         }
  24         return nil
  25 }
  26
  27 // InterfaceMulticastAddrMessage represents a routing message
  28 // containing network interface address entries.
  29 //
  30 // Deprecated: Use golang.org/x/net/route instead.
  31 type InterfaceMulticastAddrMessage struct {
  32         Header IfmaMsghdr2
  33         Data   []byte
  34 }
  35
  36 func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
  37         var sas [RTAX_MAX]Sockaddr
  38         b := m.Data[:]
  39         for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
  40                 if m.Header.Addrs&(1<<i) == 0 {
  41                         continue
  42                 }
  43                 rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
  44                 switch rsa.Family {
  45                 case AF_LINK:
  46                         sa, err := parseSockaddrLink(b)
  47                         if err != nil {
  48                                 return nil, err
  49                         }
  50                         sas[i] = sa
  51                         b = b[rsaAlignOf(int(rsa.Len)):]
  52                 case AF_INET, AF_INET6:
  53                         sa, err := parseSockaddrInet(b, rsa.Family)
  54                         if err != nil {
  55                                 return nil, err
  56                         }
  57                         sas[i] = sa
  58                         b = b[rsaAlignOf(int(rsa.Len)):]
  59                 default:
  60                         sa, l, err := parseLinkLayerAddr(b)
  61                         if err != nil {
  62                                 return nil, err
  63                         }
  64                         sas[i] = sa
  65                         b = b[l:]
  66                 }
  67         }
  68         return sas[:], nil
  69 }